Questions by nikhil

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asked Jan 17, 2022 in 8th-maths

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The cost of a sewing machine is Rs 7,000. Its value depreciates at 8% p.a. Then the value of the machine after 2 years is Rs

asked Jan 17, 2022 in 8th-maths

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The compound interest on a sum of Rs P for T years at R% per annum compounded annually is given by the formula

asked Jan 17, 2022 in 8th-maths

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Find the M.P. if (a) S.P. = Rs 495 and discount = 1% (b) S.P. = Rs 9,250 and discount = `7

asked Jan 17, 2022 in 8th-maths

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Devangi’s phone subscription charges for the period 17-02-09 to 16-03-09 were as follows : Period Amount (in Rs) Service Tax % 17-02-09 to 23-02-09 199.75 12 24-02-09 to 16-03-09 599.25 10 Find the final bill amount if 3% education cess was also charged on service

asked Jan 17, 2022 in 8th-maths

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Brinda purchased 18 coats at the rate of Rs 1,500 each and sold them at a profit of 6%. If customer is to pay sales tax at the rate of 4%, how much will one coat cost to the customer and what will be the total profit earned by Brinda after selling all

asked Jan 17, 2022 in 8th-maths

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The food labels given below give information about 2 types of soup: cream of tomato and sweet corn. Use these labels to answer the given questions. (All the servings are based on a 2000 calorie diet.) (a) Which can be measured more accurately : the total amount of fat in cream of tomato soup or the total amount of fat in sweet corn soup? Explain. (b) One serving of cream of tomato soup contains 29% of the recommended daily value of sodium for a 2000 calorie diet. What is the recommended daily value of sodium in milligrams? Express

asked Jan 17, 2022 in 8th-maths

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At a toy shop price of all the toys is reduced to 66% of the original price. (a) What is the sale price of a toy that originally costs Rs 90? (b) How much money would you save on a toy costing Rs

asked Jan 17, 2022 in 8th-maths

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Rain forests are home to 90,000 of the 2,50,000 identified plant species in the world. What per cent of the world’s identified plant species are found in rain

asked Jan 17, 2022 in 8th-maths

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Under the condition that the temperature remains constant, the volume of gas is inversely proportional to its pressure. If the volume of gas is 630 cubic centimetres at a pressure of 360 mm of mercury, then what will be the pressure of the gas if its volume is 720 cubic centimetres at the same

asked Jan 17, 2022 in 8th-maths

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Both u and v vary directly with each other. When u is 10, v is 15, which of the following is not a possible pair of corresponding values of u and

asked Jan 17, 2022 in 8th-maths

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In which of the following case, do the quantities vary directly with each

asked Jan 17, 2022 in 8th-maths

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Which of the following vary inversely with each

asked Jan 17, 2022 in 8th-maths

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Devangi travels 50 m distance in 75 steps, then the distance travelled in 375 steps is _______

asked Jan 17, 2022 in 8th-maths

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(i) Number of students in a hostel and consumption of food. (ii) Area of the walls of a room and the cost of white washing the walls. (iii) The number of people working and the quantity of work. (iv) Simple interest on a given sum and the rate of interest. (v) Compound interest on a given sum and the sum

asked Jan 17, 2022 in 8th-maths

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If x varies inversely as y and x = 20 when y = 600, find y when x =

asked Jan 17, 2022 in 8th-maths

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Posing a question Work with a partner to write at least five ratio statements about this quilt, which has white, blue, and purple squares. How many squares of each colour will be there in 12 such

asked Jan 17, 2022 in 8th-maths

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30 persons can reap a field in 17 days. How many more persons should be engaged to reap the same field in 10

asked Jan 17, 2022 in 8th-maths

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Match each of the entries in Column I with the appropriate entry in Column II Column I Column II 1. x and y vary inversely to each other A. x y = Constant 2. Mathematical representation of inverse B. y will increase in proportion variation of quantities p and q 3. Mathematical representation of C. xy = Constant direct variation of quantities m and n 4. When x = 5, y = 2.5 and when D. p ∝ 1 q y = 5, x = 10

asked Jan 17, 2022 in 8th-maths

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Here is a key board of a harmonium: (a) Find the ratio of white keys to black keys on the keyboard. (b) What is the ratio of black keys to all keys on the given keyboard. (c) This pattern of keys is repeated on larger keyboard. How many black keys would you expect to find on a keyboard with 14 such

asked Jan 17, 2022 in 8th-maths

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